fix: sync floating window progress via SharedPreferences listener

悬浮窗添加 SharedPreferences 监听器，Activity 侧点击列表/搜索跳转时自动同步进度，
移除 restartFloatingService 调用

Author: sedationh

app/src/main/java/com/example/epubspoon/service/FloatingService.kt

@@ -10,6 +10,7 @@ import android.content.ClipData
 import android.content.ClipboardManager
 import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
 import android.graphics.PixelFormat
 import android.os.Handler
 import android.os.IBinder
@@ -38,6 +39,19 @@ class FloatingService : Service() {
     private var segments: List<String> = emptyList()
     private var currentIndex: Int = 0
 
+    /**
+     * 监听 SharedPreferences 变化，Activity 侧修改进度时实时同步到悬浮窗
+     */
+    private val prefsListener = SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
+        if (key != null && md5.isNotBlank() && key == "progress_$md5") {
+            val newIndex = storage.loadProgress(md5)
+            if (newIndex != currentIndex && newIndex in segments.indices) {
+                currentIndex = newIndex
+                updateProgressText()
+            }
+        }
+    }
+
     companion object {
         private const val CHANNEL_ID = "epubspoon_floating"
         private const val NOTIFICATION_ID = 1
@@ -99,6 +113,9 @@ class FloatingService : Service() {
         setupFloatingView()
         Log.d("EpubSpoon", "FloatingView added to WindowManager")
 
+        // 监听进度变化（Activity 侧点击列表/搜索跳转时同步）
+        storage.registerChangeListener(prefsListener)
+
         return START_NOT_STICKY
     }
 
@@ -222,6 +239,7 @@ class FloatingService : Service() {
 
     override fun onDestroy() {
         super.onDestroy()
+        storage.unregisterChangeListener(prefsListener)
         if (::floatingView.isInitialized) {
             try { windowManager.removeView(floatingView) } catch (_: Exception) {}
         }

app/src/main/java/com/example/epubspoon/ui/MainActivity.kt

@@ -160,10 +160,6 @@ Keep this format consistent for every passage I send. No need to confirm or repe
     private fun setupRecyclerView() {
         segmentAdapter = SegmentAdapter { index ->
             viewModel.selectSegment(index)
-            // 如果悬浮窗正在运行，重启以同步进度
-            if (floatingServiceRunning) {
-                restartFloatingService()
-            }
         }
         binding.rvSegments.apply {
             layoutManager = LinearLayoutManager(this@MainActivity)
@@ -184,7 +180,6 @@ Keep this format consistent for every passage I send. No need to confirm or repe
             val targetIndex = (asNumber - 1).coerceIn(0, state.bookData.segments.size - 1)
             viewModel.selectSegment(targetIndex)
             binding.rvSegments.scrollToPosition(targetIndex)
-            if (floatingServiceRunning) restartFloatingService()
             Toast.makeText(this, "已跳转到第 ${targetIndex + 1} 段", Toast.LENGTH_SHORT).show()
             return
         }
@@ -197,7 +192,6 @@ Keep this format consistent for every passage I send. No need to confirm or repe
             if (segments[idx].contains(query, ignoreCase = true)) {
                 viewModel.selectSegment(idx)
                 binding.rvSegments.scrollToPosition(idx)
-                if (floatingServiceRunning) restartFloatingService()
                 Toast.makeText(this, "找到：第 ${idx + 1} 段", Toast.LENGTH_SHORT).show()
                 return
             }